SOLUTION: if lisa were to paint her living room alone, it would take 2 hours. Her sister Marie could do the job in 5 hours. How long would it take them working together?
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Question 838010: if lisa were to paint her living room alone, it would take 2 hours. Her sister Marie could do the job in 5 hours. How long would it take them working together? Answer by richwmiller(17219) (Show Source):
